Metal-bending machine.



No. 759,217. l

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B. P. HOLDEN.

METAL BENDING MACHINE.

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APPLIUATION FILED APB.. 25, 1003.

N0 MODEL. q, 7 SHEETS-SHEET 3.

A y 'J I f/ Ex? 4/ i 5 'l/4 -f I w gr f//- l )gli .l "Il" l l *L imirmNo. 759,217. PATENTED MAY s, 1904.

E. E. HOLDEN.

METAL BENDING MACHINE.

APPLICATION FILED APR. 25, 1903. N0 MODEL. 7 SHEETSSHEBT 4.

- lic J EL? 7 i f g il 0 WW1 n EAS 5 E 5- Q/WM PATBNTED MAY 3, 1904.

APPLICATION :FILED APR. 25., 1903.

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J M. E E f w -5, E ,zmrv WK 1 n 5M RWU a No. 759,217. PATENTED MAY 3,1904. E. P. HOLDEN.

METAL BENDING MACHINE.

l APPLICATION FILED APR. .25, 1903.

NO MODEL. 7 SHEETS-SHEET 6.

www /W No. 759,217. PATENTBD MAY s, 1904. E. P. HOLDEN.

METAL BENDING MACHINE.

APPLIGATION FILED APB. z5, mos.

no MODEL. v sums-SHEET vA f/Maw z QM/WWK@ Patented May 3, 1904.

EDVARD P. HOLDEN, OF CHICAGO, ILLINOIS.

METAL-BENDING MACHINE.I

SPECIFICATION forming part of Letters Patent No. 759,217, dated May 3,1904.

Application filed April 25, 1903. Serial No. 154,210. (No model.)

To all w/z/om/ 'it Nif/,ty concern:

Be it known that I, EDWARD I). HOLDEN, a citizen of the UnitedStates,-and a resident of the city of Chicago, county of Oook, and Stateof Illinois, have invented certain new and useful Improvements inMetal-Bending Machines; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accom panying drawings, and to the letters ofreference markedthereon, which form a part of this specification.

This invention relates to metal bending and folding machines, and moreparticularly to a machine `adapted to automatically bend a double foldin a sheet of metal, such asa canbody blank or the like.

The object of the invention is to provide a simply-constructed andrapidly-operating' metal bending and folding machine automatic in itscharacter and positive in operation.

The invention consists in the matters hereinafter described, and morefully pointed out and deiined in the appended claims.

In the drawings, Figure l is atop plan View of a device embodying myinvention. Fig'. 2 is a fragmentary front elevation, partly broken away.Fig. 3 is a section taken on line fr: .fr of Fig. 2 and illustrates theposition the parts assume at the time of receiving or engaging' theblank. Fig'. et is a similar section illus trating the position andadjustment of parts at the time of the completion of the fold. Fig. 5 isa similar section showing the retraction of the folding means and thehammer falling to close the folds or bends. Fig'. 6 is a detail of therear or holding blade and means for operating the same. Fig. 7 is adetail of the actuating means for the front carriertable. Fig. 8 is afragmentary vertical section taken longitudinally of the machine andillustrates the means for actuating the hammer. Fig. 9 is a fragmentaryend elevation of the same.

for actuating the hammer.

As shown in said drawings, said machine is constructed with a strong'frame of cast metal or other' suitablematerial, (indicated as a whole byA,) which, as shown, is rectang'ular and in which in suitable bearingsis revolubly jour- Fig. lO is a detail of the cam naled a centrallongitudinal actuating-shaft B, usually provided at one end with tightand loose pulleys in a familiar manner for the driving-belt, and whichis provided intermediate the ends with the cams and other actuatingmeans for the folding' mechanism. Supported and secu red on said frame Aan d having approximately the same length and breadth is the table A,also of metal, and provided centrally with an integral raised elongatedrib of considerable breadth, forming an anvil C, upon which is securedan anvil-facing O, of steel or other suitable material. Supported onsaid frame A and slidable transversely toward and from the anvil are thereciprocating carriag'es D and E, on which, respectively, are carriedthe folding-blade D and the rear or holding' blade E. Referring moreparticularly to the construction of said folding means and the means foractuating the same, it will be seen by reference to the drawings that anintegral arm a is provided on the inner side of the frame-front whichprojects inwardly and is provided on its extremity with an enlarged bosson which is pivotally engaged abellcrank, one arm of which projectsupwardly through a slot in the table A and is pivotally engaged on thecarriage D, while the other arm, d', projects inwardly toward the shaftB and is provided with a roller at its inner end, which projects into acam-groove in the side of a cam-disk F, whereby rotation of the shaft Bwith said cam-disk acts to reciprocate said table D. The fold er-blade Dis pivoted near its outer end on the carriage D, as shown in Figs. 3, 4,and 5, in such manner that when the carriage is retracted the uppersurface of said blade lies approximately in the plane with the top ofthe anvil-plate.

Means are provided for elevating' the inner end Z3 of said folder-bladesimultaneously with the inward movement thereof comprising a lever G,pivoted at the rear side of the frame and extending' forwardly over theshaft B and provided on its inner side with a roller engaging in asuitable cam-groove in the camdisk Gr. rIhe inner end of said lever (ifis provided with a rod 51, pivoted thereon, which extends upwardlythrough the table Aon the front side of the anvil and is provided at itsIOO top with a iattened plate or head g', on which tracks a roller g2,secured on the lower side of the tucker-blade D near the inner edgethereof. The cam-groove disk G is formed to elevate the inner edg'e ofthe folder-blade D when the bell-crank acts to move the same inwardlyinto the position shown in Fig. 4, said roller g2 moving back and forthover the enlarged head or plate g as said blade is reciprocated. Vhilesaid folder-blademay be constructed integrally, it is shown providedwith a facing (Z3, of steel or other suitable metal, at its inner edge,which, as shown, inclines upwardly and inwardly on its under side.

The i'ear carriage E is reciprocated toward and from the anvil in amanner similar' to the carriage Dvthat is to say, integral arms aproject inwardly from the rear side of the frame and provided with aboss, as before described, on which is pivoted a bell-crank, one arm eof which extends upwardly through a slot in the table A and pivotallyengages on the under side of the carriage vE. The other end of saidbell-crank extends inwardly beneath the shaft B and is provided with arolle'r which engages in a cam-groove in a disk H. Pivoted on thecarriag'e E by means of a transverse shaft E2 is a clamping-jaw I, whichprojects toward and above the anvil at its front z'f and having' belowthe shaft E2 downwardly-extending ends c', which pass through the tableA and carriage E. Said ends are blank upon the anvil-facing.

each provided with an elongated transverse slot at thelower ends. Saidjaw has approximately the same length as the anvil and is provided onits under side with the forwardly-projecting holding-blade E,comprisinga plate of steel or oth er suitable material rigidly bolted inplace, and which forms a facing for the clamping-jaw to engage themetalblank to be bent or folded upon the anvil-facing C. The upper lside ofsaid plate E adjacent to its edge is beveled downwardly or complementarywith the beveled edge of the folding-plate d3. Said Y jaw is actuated inpart by the reciprocation of 'said carriage E and in part by means of acam-disk H, each provided in one side with a cam-groove in which engagesa roller carried on a connecting-rod E. Each connecting-rod at one endis provided with a roller engaging in a transverse slot in one of theends 2' of said jaw I and at its lower end is yoked and engages over theshaft B, as shown in Fig. 6. The said cam-disk H is so adjusted upon theshaft B that when the table E reciprocates inwardly toward the anvil theconnecting-rod Eb is forced upwardly and outwardly to the rearmost limitof the groove, the lower endsz' of said )jaw thereby forcing said jaw toits forward limit of movement, as shown in Fig. 4, or, in other words,into position to engage a The reverse or outward movement of the table Eis accomplished simultaneously with the downward and inward movement ofthe connecting-rod, which acts to move said jaw or holding-plate in theposition indicated in Fig. 5.

At each end of the machine and rigidly bolted on the table are the waysK, between which moves the hammer J, provided with a facing' j.corresponding with the facing C of the anvil. Said hammer is in lengthequal to said anvil or, in other words, of a length somewhat' greaterthan the maximum length of the material or blank to be formedthereunder. Means are provided for actuating said hammer automaticallyand in unison with the va* rious movements of the folding means. Asshown, said actuating means comprise a camdisk L, rigidly secured on theshaftB at each end of the machine, as shown in Figs. 1 and 2, and inwhich engag'es a roller j of a reciprocating rod J. Said rods are eachprovided at its end with an elongated slot or aperture through which theshaft B passes and within whichand rigidly secured on the frame is anangular collar f2, which serves as a guide for said connecting-rod. Theupper end of each rod is apertured to receive the reduced end ,/'3 ofthe hammer, said aperture having its greatest length vertically.Set-screws j* are provided, extending into said aperture and bearingagainst the ends of the hammer, thereby permitting adjustment of thehammer.

As shown, an arm E3, integral with the jaw l, extends rearwardly and isprovided in its extremity with a set-screw a, whereby the rearward throwof the jaw may be regulated. A tension device isfalso provided on saidarm comprising a vertical stud E4.v rigidly secured in said carriag'eand passing through said arm E3 and on which is provided a strong coiledspring bearing on said arm and against a nut secured at the'upper end ofthe stud. Said tension device acts to take up the jar or con-y cussionincident to the violent inward move ment of said jaw and acts to preventsaid holding-blade from imparting a blow upon the blank. Means are alsoprovided to prevent said jaw from moving' inwardly until the hammer isretracted. For this purpose a strong rod or stud M is secured on therear side of the hammer and extends through a notch or slot in the topof the jaw I and which as the jaw is retracted rearwardly acts toprevent the return of said jaw until the hammer is elevated sufficientlyto permit said stud M to pass again through the slot, the inward strainon said hammer being meanwhile sustained against the end of said studand on the tension before described.

The operation is as follows: The blank when fed into the machine is slidalong over the folding-blade D and upon the facing' C of the anvil, atwhich moment the holdingblade E is reciprocated inwardly by means of thebell-crank e e and the outward movement of the connecting-rod E, therebybring'- ing the said holding-plate into firm clamping lIO engagementwith the inner margin of the plate or blank. At the moment saidholding-blade engages the blank the bell-crank Z CZ/ is reciprocatedinwardly at its upper end, moving the carriage D toward the anvil, andsimultaneousl y with said movement the inner end of the lever G iselevated, carrying upwardly the inner end of the folder-blade,

which owing to the beveled or eomplemental inclinations of theholder-plate and folding'- 'blade slides upwardly and inwardly, as shownin Fig. et, forming a double or compound bend for the entire length ofthe blank. At this moment, the bend having been formed,

the bell-crank levers e e' CZ d' and the connecting-rod E and lever Gact simultaneously to retract said holding' and folding means out of thepath of the hammer, which immediately is drawn downwardly with someviolence by the rod J bringing' suflicient pressure to bear upon thefolded blank to entirely close said folds. Fig. 5 shows the hammer atabout the middle of its downward niovement and the holding' and foldingmeans retracted as before described. This operation is repeated withgreat rapidity or as rapidly as it is possible to supply the blanks tothe machine, the hammer in each instance being returned to its elevatedposition by Ameans of the cams L and the folding-blade and holding-plateor jaws reciprocating inwardly and outwardly to form the bends andfolds, as shown and described. Obviously the movement of the holding,folding, and closing mechanism may be otherwise effected, and manydetails of arrangement, construction, and means of operation may bevaried without departing from the principles of this invention.

l claim as my invention- 1. The combination with a holding-jaw, of anupwardly and inwardly reciprocating folding-plate having an edge beveledcomplementary therewith, means for retracting the holding-jaw andfolding-plate simultaneously, a hammer and means for actuating saidhammer into engagement with the blank after the retraction of theholding and folding means.

2. The combination with an anvil, of aholding-jaw adapted to engage ablank thereon, folding' means adapted to bend a sheet of materialupwardly over the holding-jaw forming a compound bend therein, a hammercarried above said jaws, and means for simultaneously retracting theholding-jaw and folding means and reciprocating actuating means for thehammer acting when the blank is released from the folding and holdingmeans.

3. The combination with an anvil, of aholding-jaw adapted to engage ablank thereon, a folding-plate adapted to be rcciprocated inwardl y andupwardly over the holding-jaw and having' an edge beveled complementarytherewith, a hammer and means acting to retract the holding-jaw andfolding means and to actuate said hammer simultaneously therewith.

4. A machine of the class described comprising laterally-reciprocatingmeans for engagement of a blank or the like upon an anvil, folding meanscomprising a blade adapted to be moved upwardly and inwardly over theholding means and a vertically-reciprocating hammer adapted to close thefolds of the partlyfolded blank after the retraction of said holdingmeans.

5. The combination with an anvil, of a holding-jaw adapted to engage ablank thereon, an upwardly and inwardly reciprocating' folding'- platehaving its upper surface normally in a plane with the anvil, means forrecillrocating said folding-plate upwardly and in ward ly over theholding-jaw, means for retracting said holding-jaw and folding-plate, ahammer and means for actuating' the same into engagement with the blankupon the anvil after the holding-jaw and folding-plate are retracted.

6. The combination with an anvil, of a vertically -reciprocating' hammerlocated above the same, a holding-jaw adapted to engage a blank of sheetmetal upon the anvil, a folding'- plate having its surface normally in aplane with the top of the anvil, means for reciproeating saidfolding-plate upwardly and inwardly over the holding-j aw, therebyforming an inward bend in the blank upon the anvil between the hammerand holding-jaw, means acting to simultaneously retract the holdingjawand folding-plate, and means actuating' the hammer simultaneously withsuch retraction.

7. `In a metal folding or bending machine, the combination with ananvil, of a verticallyreciprocating hammer, oppositely-reciprocatingholding means and folding means between Said anvil and hammer, means foroperating the holding and folding means alternately inwardly andsimultaneously outwardly, said holding and folding' means acting toengage a blank upon the anvil and form between the same al: double foldor bend in the blank between the anvil and the hammer' and meansactuating the hammer to fall and close the fold.

8. The combination with an anvil, of a holding-jaw having anupwardly-beveled surface, and adapted to engage a blank on the anvil, afolding-plate having an under beveled surface and reciprocatingupwardlyand inwardly over the holding-jaw, a hammer positioned in proximity withand above the anvil and` against which the blank is forced in formingthe initial-part of the fold said hammer acting when the folding meansare retracted to close the folds in the blank upon the anvil.

9. The combination with an anvil, of a vertically-reciprocating hammerabove the same, inwardly and upwardly reciprocating folding meansadapted to engag'e a blank on said anvil and to form a compound bendtherein,

IOO

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means for moving said folding' means alternately in one direction andsimultaneously in the opposite, one of said folding' means serving as afeed-table when in its normal position.

lO. The combination with an anvil,of aholding-jaw adapted to engage ablank thereon, a hammer positioned above the anvil, and an upwardly andinwardly reciprocating feed-table having an under beveled inner edge,andadapted to jam a fold on the blank between the hammer and theholding-jaw, thereby forming a compound bend in the blank adapted to beclosed by the fall of the hammer and when the holding-jaw and feed-tableis retracted.

l1. The combination with an anvil, a hammer positioned above the same,of a holdingjaw reciprocating between the hammer and anvil and engaginga blank on the anvil, means for folding the metal between theholding-jaw and hammer, a resilient tension device on the holding-jawand means for throwingI the holding-jaw and folding means alternatelyinto operative position.

l2. In a machine of the class described the combination with an anvil,of means for engaging a blank thereon comprising aninwardlyreciprocating pivotallysupported holdingjaw, arearwardly-directed projection or arm thereon and spring tension engagedon said arm and acting to regulate the inward throw of said holding-jaw.

13. The combination with an anvil, of a carriage on each side of thesame, a holding-jaw pivotally supported on one of the same and afeed-table comprising' a folding-plate on the other, means acting tomove the folding-plate and holding-jaws alternately in one direction andsimultaneously in the opposite direction, said folding-plate andholding-jaw acting simultaneously to fold a blank on the anvil.

14. In a machine of the class described the combination with an anvil,of oppositely-reciprocating carriages on each side thereof, aholding-jaw on one of the carriages movable with and independently ofthe carriage and acting to engage a blank on the anvil, a holding-plateon the other carriage reciprocating therewith and in one position of thecarriage forming atable and in the other position reciprocating inwardlyand upwardly over the holding-jaw, said holding and folding meansretractingsimultaneously after the blank has been initially folded and ahammer acting to close the folds after the retraction of said hammer andfolding means.

In testimony whereof I have hereunto subscribed my name in the presenceof two subscribing witnesses.

i -EDVARD P. HOLDEN. Witnesses:

`A. C. ODELL,

WV. WV. VITHENBURY.

